US20070158112A1 - Rotary fluid-sealing structure using speed-reduction stages - Google Patents
Rotary fluid-sealing structure using speed-reduction stages Download PDFInfo
- Publication number
- US20070158112A1 US20070158112A1 US11/619,716 US61971607A US2007158112A1 US 20070158112 A1 US20070158112 A1 US 20070158112A1 US 61971607 A US61971607 A US 61971607A US 2007158112 A1 US2007158112 A1 US 2007158112A1
- Authority
- US
- United States
- Prior art keywords
- wash pipe
- disposed
- sealing system
- structure according
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 64
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 13
- 230000001050 lubricating effect Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000004519 grease Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/05—Swivel joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/02—Swivel joints in hose-lines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/54—Other sealings for rotating shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction
- F16L27/04—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces
- F16L27/047—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly spherical engaging surfaces held in place by a screwed member having an internal spherical surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
- F16L27/0816—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings having radial sealing
Abstract
Description
- The present application claims priority from U.S. Provisional Patent Application Ser. No. 60/756,781 filed Jan. 6, 2006. This document is to be expressly incorporated herein in its entirety by this specific reference thereto.
- The present invention generally relates to sealing devices which require added sealing performance and as such particularly applies to severe fluid sealing applications such as, for example, a sealing system or structure for a wash-pipe rotary swivel joint used in oil drilling rig top drives.
- The present invention is particularly applicable for rotary sealing systems for sealing drilling mud on land or sea-based drilling platforms. The conditions in this operation include a combination of extremely high pressure, up to 7,500 psi, high-speed up to 2000 fpm and high temperature to 350° Fahrenheit or higher.
- Drilling pipe diameters are generally from 3 to 5 inches and as a result of high pressure×velocity (PV) conditions, the life of the sealing system is relatively short and unpredictable.
- The present invention includes a sealing structure which provides predictability in seal service life which, in turn, prevents costly unplanned downtime and longer sealing system life by useful factors.
- A rotary fluid-sealing structure using speed reduction stages in accordance with the present invention generally includes a rotatable lower member, a fixed upper member, and an intermediate rotatable member disposed between the lower and upper members.
- A first sealing system is disposed between the lower member and the intermediate member and a second sealing system is disposed between the intermediate member and the upper member.
- Means, coupling the lower member and the intermediate member, is provided for causing the intermediate member to have a rotational speed lower than a rotational speed of the lower member in order to reduce speed differential across each of the sealing systems.
- In accordance with aspects of the present invention, a plurality of intermediate rotatable members may be sequentially disposed between the lower member and the upper member. Thus, sealing systems disposed between adjacent lower intermediate and upper members are provided with lower or reduced speed differentials there across.
- In other aspects of the present invention, a fluid-sealing structure may include a spline driven rotatable lower wash pipe, a fixed upper wash pipe, and an intermediate rotatable wash pipe concentrically disposed with the lower wash pipe and having one end thereof disposed over an end of the lower wash pipe and another end thereof abutting a face of the upper wash pipe.
- In yet other aspects of the present invention, a rotary fluid-sealing system is disposed between the lower wash pipe and the intermediate wash pipe and a pressure sealing system is disposed between the intermediate wash pipe and the upper wash pipe.
- The pressure sealing systems for the reduced-speed stages could use either of several types of fluid seals including an elastrometric V-type packing or an energized lip-seal of a polymeric type plastic material, etc. For this example, the figure shows a pressure seal-system innovation. At each pressure-seal location is a seal system consisting of two pressure-seals separated by a grease-pack. This configuration provides a means of isolating the harsh sealing challenges of both the abrasive media and the high differential pressure.
- In certain preferred embodiments, a sun driving gear is disposed on an outer circumference of the lower wash pipe along with a fixed ring gear and a plurality of planetary spur gears, coupled to the intermediate wash pipe, are disposed between the lower wash pipe driving gear and the ring gear in order to cause the intermediate wash pipe to have a rotational speed lower than a rotational speed of the lower wash pipe to reduce speed differentials across each of the sealing systems. Preferably, a rotational speed experienced by each of the sealing systems is half the rotational speed of the lower wash pipe.
- The advantages and features of the present invention may be more clearly understood by the following detailed description when considered in conjunction with the appended drawings of which:
-
FIG. 1 is a cross sectional view of a rotary fluid-sealing structure using space-reductions stages in accordance with the present invention generally showing a lower member, and intermediate member, and an upper member along with two sealing systems and a sun-driving gear, ring gear with planetary spur gears disposed therebetween; -
FIG. 2 is a cross sectional view taken along the line 2-2 ofFIG. 1 showing the planetary gear system; and -
FIG. 3 is a view taken along the line 3 ofFIG. 2 illustrating an individual planetary gear engaging the sun-driving gear and the ring gear. - With reference to
FIG. 1 , a rotary fluid-sealing structure 10 provided in accordance with aspects of the present invention is shown, which includes a rotatable lower member, or wash pipe, 12 which is driven by ashaft spline 14 for a lower drive collar (not shown) along with a fixed upper member, orwash pipe 20, with an intermediate rotatable member, or wash pipe 24, disposed between thelower wash pipe 12 andupper wash pipe 20 as will be hereinafter described in greater detail. The fluid-sealing structure 10 may be useable with a land or sea-based drilling platform comprising drivers, such as motors and pumps, a rotating drill string, a hoisting structure, and means for circulating drilling fluid. - A first pressure sealing system 28 is disposed between the lower member, or wash pipe, 12 and the intermediate member, or wash pipe, 24. The first sealing system 28, is a media-isolation sealing system and is configured to isolate two harsh conditions of a hard to seal media, i.e. drilling mud that is both abrasive and non-lubricating and a high-pressure differential. The components of the sealing system 28, namely the
floating seal 30, the rear seal 32 and the grease pack 34, are preferably selected to withstand adverse conditions. In operation, the media isolation system functions as follows: - The media pushes on the floating
barrier lip seal 30, which is typically a U-cup lip seal that can be spring and media pressure energized. Behind the floatingseal 30 is a lubricating fluid 34, usually grease, that transfers pressure to the rear seal 32 and provides lubrication for the sealing system 28 to increase surface life. The floatingseal 30 then floats a small distance to maintain the pressure on the grease pack, or lubricating fluid, 34. - A
second sealing system 38 is disposed between the intermediate wash pipe 24 and a face 40 of theupper wash pipe 20 and includes a floatingseal 44, a rear seal 46, and a grease pack, or lubricating fluid, 48 disposed there between. Thesecond sealing system 38, is a media-isolation sealing system similar to the sealing system 28 described above. The two seal system may be known as pressure seals in the relevant art. - It should be appreciated that while the wash pipe drive system, or structure, 10 is shown with one intermediate wash pipe member 24, an arrangement with multiple identical or similar intermediate wash pipes may be incorporated to further reduce PV values on the seal systems to provide a longer service life, only two
seal systems 28, 38 being shown. As further discussed below, a respective epicyclic gearing or planetary gearing system would further reduce the rotational velocity of each successive intermediate wash pipe to thereby reduce the PV values and therefore increase seal performance and seal life. - With reference also to
FIG. 2 , a sun-driving gear 52 is disposed on acircumference 54 of thelower wash pipe 12 along with afixed ring gear 58 and a plurality ofplanetary spur gears 60 provide a means, coupling thelower wash pipe 12 and the intermediate member pipe 24, for causing the intermediate wash pipe 24 to have a lower rotational speed than a rotational speed of the lower wash pipe in order to reduce speed differentiation across each of thesealing systems 28, 38. - It should be appreciated that while a geared system is provided for coupling the
lower wash pipe 12 and the intermediate wash pipe 24 for exemplary purposes, the drive system could incorporate any of several drive mechanisms or means (not shown) such as chains, belts, other mechanical drive systems, an electric motor system, a hydraulic motor system or pneumatic motor system. All of these couplings for reducing the speed between thelower wash pipe 12 and intermediate wash pipe 24 are to be considered within the scope of the invention. - In accordance with the present invention, the intermediate wash pipe 24 rotates at a reduced speed, perhaps 50 percent, relative to the lower wash pipe rotation and thus the two
sealing systems 28, 38 will experience lower speed differential there across, which provides for reduced PV values and therefore an increase in seal service life. - In operation, the sun-
drive gear 52 meshes with theplanetary spur gear 60, which in turn meshes with thefixed ring gear 58 to obtain a speed reduction that is determined by the gear ratios. Thespur gear 60 may be coupled with the intermediate wash pipe 24 by pins 64. - More particularly, the intermediate wash pipe 24 may be supported at an upper end 66 by a bushing 68 and a plurality of spring energized lip seals 72, 74, 76 Lubricating oil is provided in a cavity 78 for lubricating the
drive gear 52,ring gear 58, and plurality ofplanetary gears 60. - The sealing system 28 bears against a
retaining ring 82 which provides a fixture for supporting abushing 84 for alower portion 88 of the intermediate wash pipe 24. Similarly, aretaining ring 92 supports abushing 68, and retaining ring 119 supports a bushing 94. - The structure 10 is assembled with a wash
pipe top nut 96 screwed to threads 100 on the fixedupper wash pipe 20 along withbolts Relief ports bushings planetary gear 60. Spring energized lowfriction lip seals 72, 74, 118 are placed, as shown, to confine any leakage from the sealing system to therelief ports - Although there has been hereinabove described a specific rotary fluid-sealing structure using speed-reduction stages in accordance with the present invention for the purpose of illustrating the manner in which the invention may be used to advantage, it should be appreciated that the invention is not limited thereto. That is, the present invention may suitably comprise, consist of, or consist essentially of the recited elements. Further, the invention illustratively disclosed herein suitably may be practiced in the absence of any element which is not specifically disclosed herein. Accordingly, any and all modifications, variations or equivalent arrangements which may occur to those skilled in the art, should be considered to be within the scope of the present invention as defined in the appended claims. As examples, grease ports may be incorporated to replenish the grease packs, each sealing system may include multiple seals having multiple grease packs positioned there between to gradually reduce the seal back pressure for the subsequent seal stages, and using split-housings where applicable for ease of maintenance and repairs, just to name a few.
Claims (18)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/619,716 US7464750B2 (en) | 2006-01-06 | 2007-01-04 | Rotary fluid-sealing structure using speed-reduction stages |
PCT/US2007/000267 WO2007081797A2 (en) | 2006-01-06 | 2007-01-05 | Rotary fluid-sealing structure using speed-reduction stages |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75678106P | 2006-01-06 | 2006-01-06 | |
US11/619,716 US7464750B2 (en) | 2006-01-06 | 2007-01-04 | Rotary fluid-sealing structure using speed-reduction stages |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070158112A1 true US20070158112A1 (en) | 2007-07-12 |
US7464750B2 US7464750B2 (en) | 2008-12-16 |
Family
ID=38231664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/619,716 Expired - Fee Related US7464750B2 (en) | 2006-01-06 | 2007-01-04 | Rotary fluid-sealing structure using speed-reduction stages |
Country Status (2)
Country | Link |
---|---|
US (1) | US7464750B2 (en) |
WO (1) | WO2007081797A2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070080501A1 (en) * | 2005-09-16 | 2007-04-12 | Bal Seal Engineering Co., Inc. | Pressure gradient rotary sealing system |
US20080067754A1 (en) * | 2006-09-14 | 2008-03-20 | John Schroeder | Pressure gradient rotary sealing system with external piston |
US20080136109A1 (en) * | 2006-12-06 | 2008-06-12 | Neil Edward West | Top drive oil flow path seals |
WO2008102175A1 (en) * | 2007-02-22 | 2008-08-28 | National Oilwell Varco, L.P. | Top drive apparatus |
US10214979B2 (en) * | 2015-11-20 | 2019-02-26 | Anthony Ray Boyd | Swivel pressure head and method of use |
CN111271528A (en) * | 2020-01-21 | 2020-06-12 | 宝鸡石油机械有限责任公司 | Double-speed telescopic high-pressure manifold connecting device |
CN111678274A (en) * | 2020-06-17 | 2020-09-18 | 中国电子科技集团公司第十四研究所 | Liquid rotary transmission device resistant to severe environment |
US11009157B2 (en) * | 2015-05-14 | 2021-05-18 | De Pretto Industrie S.R.L. | Joint for submarine connections |
GB2599128A (en) * | 2020-09-24 | 2022-03-30 | Crane John Uk Ltd | Apparatus and Method |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8573599B2 (en) * | 2008-01-15 | 2013-11-05 | Stoneage, Inc. | Unitary high pressure slip seal cartridge |
US10520091B2 (en) | 2009-07-08 | 2019-12-31 | Bal Seal Engineering, Inc. | Double direction seal with locking |
US8428724B2 (en) | 2011-03-11 | 2013-04-23 | Greatbatch Ltd. | Low insertion force electrical connector for implantable medical devices |
US10125872B2 (en) | 2011-08-18 | 2018-11-13 | Bal Seal Engineering, Inc. | Reciprocating seal for high pulsating pressure |
CN105143591B (en) | 2013-03-05 | 2017-05-03 | 哈里伯顿能源服务公司 | Roll reduction system for rotary steerable system |
WO2014182312A1 (en) * | 2013-05-10 | 2014-11-13 | Halliburton Energy Services, Inc. | Positionable downhole gear box |
WO2015094146A1 (en) | 2013-12-16 | 2015-06-25 | Halliburton Energy Services, Inc. | Pressure staging for wellhead stack assembly |
US10598241B2 (en) | 2014-02-26 | 2020-03-24 | Bal Seal Engineering, Inc. | Multi deflection canted coil springs and related methods |
US10117366B2 (en) | 2015-12-14 | 2018-10-30 | Bal Seal Engineering, Inc. | Spring energized seals and related methods |
US10344552B2 (en) | 2015-12-15 | 2019-07-09 | Weatherford Technology Holdings, Llc | Rotating control device having a partition seal assembly |
US11536373B2 (en) | 2016-03-07 | 2022-12-27 | Bal Seal Engineering, Llc | Seal assemblies and related methods |
EP3312482B1 (en) | 2016-10-24 | 2023-09-13 | Bal Seal Engineering, LLC | Seal assemblies for extreme temperatures and related methods |
US10989305B2 (en) * | 2016-10-31 | 2021-04-27 | Bal Seal Engineering, Llc | Axial and radial floating seals |
EP3376077B1 (en) | 2017-03-16 | 2020-04-29 | Bal Seal Engineering, Inc. | V-springs, seals with v-springs, and related methods |
CN107299825B (en) * | 2017-07-11 | 2019-01-04 | 西北工业大学 | A kind of inertial confinement induction drilling apparatus of adjoint PDC drill bit |
US10900531B2 (en) | 2017-08-30 | 2021-01-26 | Bal Seal Engineering, Llc | Spring wire ends to faciliate welding |
US11353079B2 (en) | 2017-10-05 | 2022-06-07 | Bal Seal Engineering, Llc | Spring assemblies, applications of spring assemblies, and related methods |
EP3567285A1 (en) | 2018-05-08 | 2019-11-13 | Bal Seal Engineering, Inc. | Seal assemblies and related methods |
US11746906B1 (en) | 2022-11-01 | 2023-09-05 | Bal Seal Engineering, Llc | Lip seals and related methods |
US11940049B1 (en) | 2022-11-01 | 2024-03-26 | Bal Seal Engineering, Llc | Lip seals and related methods |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3901330A (en) * | 1973-11-21 | 1975-08-26 | Brown Oil Tools | Electric power drive assembly |
US20020121367A1 (en) * | 2001-03-02 | 2002-09-05 | Meek Robert K. | Well tubing rotator |
US20030205864A1 (en) * | 2001-03-22 | 2003-11-06 | Dietle Lannie L | Rotary sealing device |
US20060035746A1 (en) * | 2004-08-12 | 2006-02-16 | Griggs Steven H | Drive shaft assembly and method of separation |
US7231969B2 (en) * | 2004-06-07 | 2007-06-19 | Varco I/P, Inc. | Wellbore top drive power systems and methods of use |
-
2007
- 2007-01-04 US US11/619,716 patent/US7464750B2/en not_active Expired - Fee Related
- 2007-01-05 WO PCT/US2007/000267 patent/WO2007081797A2/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3901330A (en) * | 1973-11-21 | 1975-08-26 | Brown Oil Tools | Electric power drive assembly |
US20020121367A1 (en) * | 2001-03-02 | 2002-09-05 | Meek Robert K. | Well tubing rotator |
US20030205864A1 (en) * | 2001-03-22 | 2003-11-06 | Dietle Lannie L | Rotary sealing device |
US7231969B2 (en) * | 2004-06-07 | 2007-06-19 | Varco I/P, Inc. | Wellbore top drive power systems and methods of use |
US20060035746A1 (en) * | 2004-08-12 | 2006-02-16 | Griggs Steven H | Drive shaft assembly and method of separation |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070080501A1 (en) * | 2005-09-16 | 2007-04-12 | Bal Seal Engineering Co., Inc. | Pressure gradient rotary sealing system |
US20080067754A1 (en) * | 2006-09-14 | 2008-03-20 | John Schroeder | Pressure gradient rotary sealing system with external piston |
US20080136109A1 (en) * | 2006-12-06 | 2008-06-12 | Neil Edward West | Top drive oil flow path seals |
US7472762B2 (en) * | 2006-12-06 | 2009-01-06 | Varco I/P, Inc. | Top drive oil flow path seals |
WO2008102175A1 (en) * | 2007-02-22 | 2008-08-28 | National Oilwell Varco, L.P. | Top drive apparatus |
US11009157B2 (en) * | 2015-05-14 | 2021-05-18 | De Pretto Industrie S.R.L. | Joint for submarine connections |
US10214979B2 (en) * | 2015-11-20 | 2019-02-26 | Anthony Ray Boyd | Swivel pressure head and method of use |
CN111271528A (en) * | 2020-01-21 | 2020-06-12 | 宝鸡石油机械有限责任公司 | Double-speed telescopic high-pressure manifold connecting device |
CN111678274A (en) * | 2020-06-17 | 2020-09-18 | 中国电子科技集团公司第十四研究所 | Liquid rotary transmission device resistant to severe environment |
GB2599128A (en) * | 2020-09-24 | 2022-03-30 | Crane John Uk Ltd | Apparatus and Method |
WO2022064167A1 (en) * | 2020-09-24 | 2022-03-31 | John Crane Uk Limited | Apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
WO2007081797A3 (en) | 2008-04-03 |
US7464750B2 (en) | 2008-12-16 |
WO2007081797B1 (en) | 2008-05-15 |
WO2007081797A2 (en) | 2007-07-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7464750B2 (en) | Rotary fluid-sealing structure using speed-reduction stages | |
RU2405904C2 (en) | Drilling assembly for well (versions) and support mechanism and turbine power plant for drilling assembly | |
EP2743462B1 (en) | Lubricant system | |
CN103453122B (en) | Bearing lubrication system | |
US20150114721A1 (en) | Downhole Motor with Concentric Rotary Drive System | |
CN107435565B (en) | Oil transfer unit for transferring oil between a stationary part and a rotating part | |
CN1263620C (en) | Drive device | |
CN101061333A (en) | Vehicular automatic transmission | |
CN110685592B (en) | Non-support speed-reducing turbine drilling tool for petroleum drilling | |
CN102537268B (en) | Hydraulic clutching and gear-shifting transmission case of coal mine gallery drilling machine | |
CN104854377A (en) | Clutch cooling system | |
CN1181279C (en) | Swivel appts. | |
CN1079924C (en) | Sealing arrangement | |
US6361217B1 (en) | High capacity thrust bearing | |
CN202732861U (en) | Hydraulic clutching gear-shifting transmission box of prospecting drill | |
US10968916B2 (en) | Seal arrangement for superchargers | |
CN210397504U (en) | Friction plate type overrunning clutch and loader comprising same | |
CN104329250A (en) | Low flow pulsating bidirectional gear pump | |
CN111042913A (en) | Power output device of engineering machinery diesel engine and assembling method thereof | |
CN206274029U (en) | A kind of elastomer lobed rotor pump damps anti-reverse-rotation structure with transient state | |
RU2039184C1 (en) | Gear box insert of bottom hole drilling engine | |
CN110925406A (en) | Cutting speed reducer and tunneling and anchoring machine | |
CN102927394A (en) | Revolution conveying device | |
CN110360244B (en) | Friction plate type overrunning clutch and loader comprising same | |
CN220060440U (en) | Main driving speed reducer of external pipe jacking machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BAL SEAL ENGINEERING CO., INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHAPEL, RODNEY;SCHROEDER, JOHN W.;REEL/FRAME:018909/0666;SIGNING DATES FROM 20070109 TO 20070111 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20121216 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, ILLINOIS Free format text: AMENDED AND RESTATED PATENT COLLATERAL SECURITY AND PLEDGE AGREEMENT;ASSIGNORS:KAMATICS CORPORATION;BAL SEAL ENGINEERING, LLC;REEL/FRAME:054304/0388 Effective date: 20200915 |